Path.GetRandomFileName Method

The GetRandomFileName method returns a cryptographically strong, random string that can be used as either a folder name or a file name. Unlike GetTempFileName, GetRandomFileName does not create a file. When the security of your file system is paramount, this method should be used instead of GetTempFileName.

The following example show output from the GetRandomFileName method.

using System;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string result = Path.GetRandomFileName();
            Console.WriteLine("Random file name is " + result);
        }
    }
}

/*

 This code produces output similar to the following:

 Random file name is w143kxnu.idj
 Press any key to continue . . .

 */

.NET Framework

.NET Framework Client Profile

.NET for Windows Store apps

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference